Mast mooring buoys, also know as pick-up buoys or flag buoys, are great for attaching to your mooring pennant. Scuba divers, too, swear by them and use them to mark where they are diving. These floating buoys are made by Taylor, the leader in fenders, mooring balls and buoys. They make for extremely simple retrieval upon returning to port. A long fiberglass stem extends from the center of the float and can serve as the pick-up stick or flag holder.